Aspen (genus Populus) is a common name for certain tree species, some, but not all, of those that are classified by botanists in the section Populus, of the poplar genus. The aspens are all native to cold regions with cool summers, in the north of the Northern hemisphere, extending south at high altitudes in the mountains. They are all medium-sized deciduous trees reaching 15–30 m (49–98 ft) tall.
Wand-quality aspen wood is white and fine-grained, and highly prized by all wand-makers for its stylish resemblance to ivory and its usually outstanding charmwork. The proper owner of the aspen wand is often an accomplished duellist, or destined to be so, for the aspen wand is one of those particularly suited to martial magic.
An infamous and secretive eighteenth-century duelling club, which called itself The Silver Spears, was reputed to admit only those who owned aspen wands. Garrick Ollivander often found that aspen wand owners are generally strong-minded and determined, more likely than most to be attracted by quests and new orders; this is a wand for revolutionaries.